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对一些非电物理量的测量,一般是先将其转换成与电阻值成比例的阻值变化,然后用由其构成的桥式放大电路对其进行测量。本文主要介绍桥式放大电路中的误差分析及如何消除误差的影响并给出了具体电路。
The measurement of some non-electrical physical quantities is generally first converted to a resistance change proportional to the resistance value, which is then measured using the bridge amplifier circuit. This article mainly introduces the error analysis of bridge amplifier circuit and how to eliminate the influence of error and gives the concrete circuit.